That depends on what size engine is in the truck. Sorry, but before that question can be answered we need that information. A 318 has about 260 horse power.
The dodge D100,150,200,250,300,350 are all medium/heavy duty trucks which were produced as 2wd trucks, the power wagon badge was placed on those d100-350 trucks which came with 4x4 or full time 4x4.
If ur lucky the sticker is still under the hood with that information on it. otherwise get a wire brush and start looking for a stamp on the pumpkin, you may even have to take the diff cover off and...